Alright, let's work through 3678 times 5648 step by step
3678 × 5648 = 5648 × (3678)
+ 5648 × 8 what gives us 45184
+ 5648 × 70 which equals 395360
+ 5648 × 600 yielding 3388800
+ 5648 × 3000 giving us 16944000

= 20773344
